The Chargers’ negotiations with No. 3 pick Joey Bosa had to reach rock bottom, and a week ago, they did.

The team and Bosa’s agents exchanged a war of press-release words last Wednesday. Chargers president of football operations John Spanos claimed the team’s best offer had been made — and rejected — and it would only go down from there.

“It is unfortunate the San Diego Chargers have decided to manipulate facts and negotiate in the media,” Bosa’s agency, CAA, responded in a statement. “The team surely is not strengthening its relationship with Joey Bosa by taking this stance and making their position public.”

From Wednesday on, not much was heard from either side until a deal was agreed upon Sunday morning. The biggest issue in negotiations was the deferred money from the former Ohio State stud defensive end’s $17 million signing bonus.

As is often the case, the public silence was yielding private results.

The San Diego Union-Tribune reported a switch in the agents leading the negotiations — “a good cop, bad cop” move by the representatives at CAA — with Chargers brass as the turning point. Todd France, Bosa’s co-agent, took over for Brian Aryault, and a deal similar to the one both sides were fighting over days ago was signed.

“I prefer to keep the details quiet, but I would like to thank Todd France for his professionalism and his help in getting this deal done,” Spanos told the paper.

Now, the bitterness of the rookie negotiations — the Chargers have become infamous for such impasses — has passed. Bosa even joked about one of the lighter moments of his holdout, when his mom sent a Facebook message that said in part: “wish we pulled an Eli Manning on draft day.”

“What do you expect a mom to do, she loves me,” Bosa joked at his long-awaited introductory press conference. “Leave it to Mom to mess up on Facebook.”